Crustal Structure and Tectonic Setting of the South Cntral Andes from Gravimetric Analysis Weidmann, María Cecilia; Spagnotto, Silvana Liz; Gimenez, Mario Ernesto; Martínez, Patricia; Álvarez, Orlando; Sanchez, Marcos Ariel; Lince Klinger, Federico Gustavo En el presente trabajo, a partir de datos gravimétricos terrestres, se preparó una carta de anomalías de Bouguer, la cual fue adecuadamente filtrada a fin de separar efectos gravimétricos someros y profundos. Con base en un modelo de densidad, mediante de técnicas de inversión gravimétrica, se modeló la discontinuidad cortezamanto y el basamento cristalino, respectivamente. De forma posterior, se evaluó el espesor elástico equivalente considerando la información de la discontinuidad de la corteza-manto y la carga topográfica. Se encontraron valores altos de espesor elástico Te, al este de la precordillera Andina y al oeste de la sierra Pampeana de Velasco. Estos resultados son consistentes con los valores positivos de anomalía residual de Bouguer e isotáticos, lo que estaría indicando la presencia de rocas de alta densidad en corteza media a superior. Además, los análisis petrográficos y geoquímicos realizados en afloramientos en superficie indican un origen mantélico.; Based on terrestrial gravity data, in this paper we prepared a map of Bouguer anomalies, which was filtered to separate shallow and deep gravity sources. Based on a density model and gravimetric inversion techniques, the discontinuous crustmantle boundary and the top of crystalline basement were modeled. Subsequently, the equivalent elastic thickness (Te) was evaluated, considering information from the crust-mantle discontinuity and topographic load, finding high Te values in the eastern Andean foothills and west of the Velasco range. These results are consistent with the positive isostatic and residual Bouguer anomaly values, which suggest the presence of high-density rocks in the mid-to upper crust. In addition, petrographic and geochemical analysis conducted in surface outcrops suggest a mantle origin.

La política en los miedos de los medios y el refuerzo periodístico de estereotipos sociales: tratamiento electoral de la Izquierda en diarios cordobeses y argentinos (1999-2005); Politics in the fears of the media and journalistic reinforcing of social stereotypes: Left wing electoral treatment in newspapers of Cordoba and Argentine (1999-2005) Paz Garcia, Ana Pamela Con frecuencia, en la cobertura periodística de procesos políticos algunos estereotipos sociales traman una deliberada ausencia o invisibilización de ciertos dirigentes y partidos, o bien emergen en la exposición discrecional y reiterada de actores o propuestas reforzando lecturas contextuales específicas. Desde los aportes de la crítica ideológica, la sociología y la psicología política al estudio interdisciplinario del discurso, analizo cómo en la interpretación y toma de posicionamiento frente a los acontecimientos que permean cualquier información ofrecida por la prensa, la visión del escenario, los actores, los problemas en juego y ciertos miedos culturales, son factores clave de un enmarcamiento intencionado de la agenda electoral. En términos teóricos establezco una conexión analítica entre conceptos más abstractos como imaginario o representaciones sociales y nociones más operativas como estereotipos e ideología, recuperando el valor de su interrelación desde una perspectiva socio-psico-política sobre las instancias de circulación del discurso mediático en las democracias contemporáneas.; Frequently in the news coverage of political processes, some social stereotypes weave a deliberate absence or invisibility of certain leaders and parties, either emerge in discretionary and repeated exposure of actors or proposals by producing the reinforcement of specific contextual readings. From the contributions of ideological criticism, sociology and political psychology to the interdisciplinary study of discourse, I analyze how in the interpretation and decision-positioning to events that permeate any information provided by the press, the view of the stage, the actors, the issues involved and certain cultural fears are key factors of a deliberate framing of the electoral agenda. In theoretical terms I establish an analytical connection between more abstract concepts such as imaginary or social representations on one hand, and more operational notions such as stereotypes and ideology on the other, by recovering the value of their interrelation from a socio-psycho-political perspective about instances of circulation of media discourse in contemporary democracies.

Trypanocidal activity of tioamide-sustituted imidazoisoquinolinones: Electrochemical properties and biological effects Frank, Fernanda Maria; Ciccarelli, Allejandra Beatriz; Bollini, Mariela; Bruno, Ana M.; Batlle, Alcira Maria del C.; Lombardo, Maria Elisa Three thioamide-substituted imidazoisoquinolinones, which possess an heterocyclic center similar to tryptanthrin and are named C1, C2 and C3, were studied regarding: a) its in vitro anti-Trypanosoma cruzi activity, b) its cytotoxicity and electrochemical behaviour and c) its effect on cell viability, redox state and mitochondrial function . The assayed compounds showed a significant activity against the proliferative forms, but only C1 showed activity on the trypomastigote form (for C1, IC50 epi = 1.49 µM; IC50 amas = 1.74 µM and IC50 try = 34.89 µM). The presence of an antioxidant compound such as ascorbic acid or dithiotreitol induced a three-fold increase in the antiparasitic activity, whereas glutathione had a dual effect depending on its concentration. Our results indicate that these compounds, which exhibited low toxicity to the host cells, can be reduced inside the parasite by means of the pool of low molecular weight thiols, causing oxidative stress and parasite death by apoptosis. The antiparasitic activity of the compounds studied could be explained by a loss of the capacity of the antioxidant defense system of the parasite to keep its intracellular redox state. C1 could be considered a good candidate for in vivo evaluation .

Nautiloid cephalopod concentration beds of the San Juan Formation (Middle Darriwilian) of the Argentine Precordillera Mestre Garcia, Ana Isabel; Beresi, Matilde Sylvia; Heredia, Susana Emma; Nestell, G. Concentrations of orthoconic nautiloid cephalopods on bedding planes of the San Juan Formation limestones are for first time associated to the Yangtzeplacognathus crassus Zone (Middle Ordovician). Nautiloid cephalopod accumulations occur at several localities in the Central and Eastern Precordillera of San Juan, western Argentina. The objective of this report consists in registering Precordilleran nautiloid concentrations in the Y. crassus Zone from the shallow warm waters of the carbonate platform.

Microfossils of the Yangtzeplacognathus crassus zone in the middle darriwilian of the argentine precordillera Mestre Garcia, Ana Isabel; Beresi, Matilde Sylvia; Heredia, Susana Emma; Nestell, G. The San Juan Formation of the Eastern and Central Precordillera is composed mainly of fossiliferous limestone and marly limestone. The conodont biostratigraphy of the very top of this unit has been studied on several localities such as: Don Braulio, La Pola, Cecilia and Del Aluvión creeks, recording the Y. crassus Zone for this levels (Mestre, 2010; Mestre, 2013, Heredia and Mestre, 2013). The microfossils associated to this conodont biozone are represented by spicules, foraminifers and protoconchs, which are reported and figured in this work.

Dissecting the Metal Selectivity of MerR Monovalent Metal Ion Sensors in Salmonella Ibáñez, María Marta; Cerminati, Sebastián; Checa, Susana Karina; Soncini, Fernando Carlos Two homologous transcription factors, CueR and GolS, that belong to the MerR metalloregulatory family are responsible for Salmonella Cu and Au sensing and resistance, respectively. They share similarities not only in their sequences, but also in their target transcription binding sites. While CueR responds similarly to Au, Ag, or Cu to induce the expression of its target genes, GolS shows higher activation by Au than by Ag or Cu. We showed that the ability of GolS to distinguish Au from Cu resides in the metal-binding loop motif. Here, we identify the amino acids within the motif that determine in vivo metal selectivity. We show that residues at positions 113 and 118 within the metal-binding loop are the main contributors to metal selectivity. The presence of a Pro residue at position 113 favors the detection of Cu, while the presence of Pro at position 118 disfavors it. Our results highlight the molecular bases that allow these regulators to coordinate the correct metal ion directing the response to a particular metal injury.

The genus Grammostola Simon 1892 (Araneae: Theraphosidae): a new species from western Argentina, new synonymy and distributional data Ferretti, Nelson Edgardo; Pompozzi, Gabriel Alejandro; Gonzalez, Alda; Pérez Miles, Fernando Grammostola diminuta sp. nov. (Araneae: Theraphosidae) is described from northwestern Argentina; Grammostola vachoni Schiapelli and Gerschman 1961 is considered a senior synonym of Grammostola fossor syn. nov. Schmidt 2001 on the basis of material examined from the collection of the Museo Argentino de Ciencias Naturales ?Bernardino Rivadavia? (MACN). The geographic distribution of G. vachoni is extended on the basis of new records. Additionally, we present new diagnoses and new distributional data for Grammostola chalcothrix Chamberlin 1917, Grammostola inermis Mello-Leitão, 1941 and Grammostola pulchripes (Simon 1891).

Elemental composition of strawberry plants inoculated with the plant growth-promoting bacterium Azospirillum brasilense REC3 assessed by scanning electron microscopy and energy dispersive X-ray analysis Guerrero Molina, María Fernanda; Lovaisa, Nadia Carolina; Salazar, Sergio Miguel; Diaz Ricci, Juan Carlos; Pedraza, Raúl Osvaldo The elemental composition of strawberry plants (Fragaria ananassa cv. Macarena) inoculated with the plant growth-promoting bacterium Azospirillum brasilense REC3 and non-inoculated controls, was studied for the first time by using scanning electron microscopy (SEM) and energy dispersive X-ray (EDS) analysis. This technique allowed semi-quantification of different elements simultaneously using a small solid sample. Plants were inoculated and grown hydroponically in 50 % and 100 % Hoagland solution, corresponding to a poor- or rich- nutrient medium, respectively. Bacterial inoculated plants increased 45% and 80 % strawberry growth index compared to their controls when grown in 100% and 50% Hoagland solution, respectively. Thus, inoculation with A. brasilense REC3 in a poor-nutrient medium had the largest effect in terms of increasing both shoot and root biomass as well as growth index. SEM-EDS spectra and maps showed the elemental composition and relative distribution of nutrients in strawberry tissues. Leaves were composed of C, O, N, Na, P, K, Ca and Cu, while roots had also Si and Cl. The organic fraction (C, O and N) accounted for over the 96.3 % of the total chemical composition, and among the mineral fraction composition, Na exhibited a higher accumulation in both tissues. Azospirillum-inoculated and control plants showed similar elemental quantification values. Although, in bacteria-inoculated roots, P was significantly increased (34.33 %) while Cu was decreased (35.16 %).

An approach based on constraint satisfaction problems to disruptive event management in supply chains Guarnaschelli, Armando Gabriel; Chiotti, Omar Juan Alfredo; Salomone, Hector Enrique This work introduces a generalized model for evaluating and restoring feasibility in the execution of supply chain processes. The model was designed to provide automation to the disruption management function of Supply Chain Event Management (SCEM) systems. The repair mechanism is based on a constraint satisfaction problem that can be automatically instantiated from self-contained descriptions of the ongoing schedules without previous knowledge of the supply chain structure. The proposed mechanism intends to make surgical modifications to the current schedule which do not affect the economical and operational considerations and the allowed changes are limited to the space of slacks already included by the original schedule. This level of repair can be safely delegated to automated systems and would facilitate the design of collaborative inter-organizational business processes to manage events along the supply chain. A case study validates the applicability of the proposed models.

Maternal admixture and population structure in Mexican-mestizos based on mtDNA haplogroups Martínez Cortés, Gabriela; Salazar Flores, Joel; Haro Guerrero, Javier; Rubi Castellanos, Rodrigo; Velarde Félix, Jesus S.; Muñoz Valle, Jose F.; López Casamichana, Mavil; Carrillo Tapia, Eduardo; Casenco Avila, Luis M.; Bravi, Claudio Marcelo; López Armenta, Mauro; Rangel Villalobos, Hector The maternal ancestry (mtDNA) has important applications in different research fields, such as evolution, epidemiology, identification, and human population history. This is particularly interesting in Mestizos, which constitute the main population in Mexico (∼93%) resulting from post-Columbian admixture between Spaniards, Amerindians, and African slaves, principally. Consequently, we conducted minisequencing analysis (SNaPshot) of 11 mitochondrial single-nucleotide polymorphisms in 742 Mestizos of 10 populations from different regions in Mexico. The predominant maternal ancestry was Native American (92.9%), including Haplogroups A, B, C, and D (47, 23.7, 15.9, and 6.2%, respectively). Conversely, European and African ancestries were less frequent (5.3 and 1.9%, respectively). The main characteristics of the maternal lineages observed in Mexican–Mestizos comprised the following: 1) contrasting geographic gradient of Haplogroups A and C; 2) increase of European lineages toward the Northwest; 3) low or absent, but homogeneous, African ancestry throughout the Mexican territory; 4) maternal lineages in Mestizos roughly represent the genetic makeup of the surrounding Amerindian groups, particularly toward the Southeast, but not in the North and West; 5) continuity over time of the geographic distribution of Amerindian lineages in Mayas; and 6) low but significant maternal population structure (FST = 2.8%; P = 0.0000). The average ancestry obtained from uniparental systems (mtDNA and Y-chromosome) in Mexican–Mestizos was correlated with previous ancestry estimates based on autosomal systems (genome-wide single-nucleotide polymorphisms and short tandem repeats). Finally, the comparison of paternal and maternal lineages provided additional information concerning the gender bias admixture, mating patterns, and population structure in Mestizos throughout the Mexican territory. Am J Phys Anthropol.

Micro mesoporous activated carbon from coffee husk as biomass waste for environmental applications Gonçalves, Maraísa; Guerreiro, Mário C.; Oliveira, Luiz C. A.; Solar, Cecilia Ines; Nazarro, Marcelo; Sapag, Manuel Karim Activated carbons (ACs) with a highly developed porosity have been prepared from a lignocellulosic precursor (coffee husk) for environmental pollutant adsorption. Characterization results show that these materials exhibit a high amount oxygen groups and high specific surface area with micro mesopores. From SEM results we can see the collapse of large pores at longer activation times. The ACs obtained from coffee husk waste is a promising adsorbent material, with high adsorption capacity for the methylene blue dye (MB). Thus, the use of the coffee husk for AC preparation, with porosity development, showed as a good alternative for the waste transformation. Results also showed that the adsorption of MB by the AC-1/1 was much better than commercial AC from Merck.

Estudio de estabilidad de un dique exento semisumergido mediante modelo físico; Breakwater stability study using a physical model Rodriguez, Andres; Gyssels, Paolo; Pagot, Mariana Renee; Hillman, Gerardo Daniel; Muratore, Héctor En este trabajo se presenta el desarrollo y los resultados alcanzados a partir de la modelación física bidimensional de una protección costera exenta conformada por un dique semi-sumergido con coraza de enrocado. El dique tipo corresponde al prediseñado por el Laboratorio de Hidráulica (LH) de la Universidad Nacional de Córdoba (UNC), para las defensas de Mar del Plata y los ensayos han sido financiados por proyectos de investigación de la SeCyT-UNC y del Ministerio de Ciencia y Técnica de la provincia de Córdoba. El objetivo principal del estudio ha sido verificar experimentalmente la estabilidad del talud expuesto a las condiciones de diseño. El presente trabajo se ha realizado en el marco de dos proyectos de investigación financiados por SeCyT-UNC y el Ministerio de Ciencia y Técnica de la provincia de Córdoba. El objetivo principal del estudio ha sido verificar experimentalmente la estabilidad del talud expuesto a las condiciones de diseño. Para ello, se han reunido las experiencias existentes en bibliografía y toda la información disponible para aplicar una metodología que pueda aplicarse a la mayoría de los ensayos en laboratorio con las mismas características del presentado en este estudio. Los ensayos se han realizado en un canal vidriado de 23 m de largo, 0.5 m de anchura y 0.9 m de altura, utilizando un generador de oleaje de paleta frontal, bidimensional (HR-Wallingford). Las mediciones de oleaje se realizaron con 8 sensores de tipo resistivo. Para desarrollar esta modelación ha sido necesario readecuar las instalaciones disponibles, adaptando el fondo con el objeto de alcanzar las condiciones de rotura de la ola de diseño y definir la correcta ubicación de la estructura. Los ensayos han representado condiciones de oleaje extremo, similares a los medidos en Mar del Plata, asociado a 50 años de período de retorno con piezas de 5 Tn en la coraza y niveles de marea entre pleamar y bajamar. Se seleccionó una escala de 1:30.

Leer y escribir para no desertar en la universidad; Reading and writing in order not to drop out of university Olave Arias, Giohanny; Ilene Rojas García; Cisneros, Mireya Se indaga en las relaciones entre deserción universitaria y dificultades en las prácticas de lectura y escritura, de acuerdo con el panorama reciente de ambos fenómenos. Tras una revisión general de los estudios sobre deserción, donde se dimensiona su importancia para el desarrollo de la profesionalización en el país, las prácticas de comprensión y producción de textos son problematizadas en su especificidad en el ámbito de la educación superior y luego son relacionadas con el fenómeno de la deserción académica en términos causales. Finalmente, se convoca al análisis crítico de los actuales procesos de alfabetización universitaria a partir del reconocimiento de su relevancia en la misión formativa de la educación superior.; This text investigates the relationships between dropping out of university and difficulties in reading and writing, in accordance with the recent overview of both phenomena. After a general review of the studies on dropping out of university, in which their importance for the continued development of Colombia’s professionalization is gauged, the practices of reading comprehension and producing texts are problematized specifically in the field of higher education and are then causally related to the phenomenon of dropping out of university. Finally, the current processes of literacy at university, based on recognition of its relevance in the educational mission of higher education, are discussed.

Una defensa sistemática del pluralismo lógico Tajer, Diego En este trabajo, realizo una defensa del pluralismo lógico en una de sus versiones. En la primera parte, considero distintas formulaciones del pluralismo, analizo sus fallas respectivas e introduzco la versión que defenderé, que es la de Beall y Restall (1999, 2000, 2006). En la segunda parte, desarrollo las objeciones que cuatro monistas (Quine, Read, Priest y Field) hicieron al pluralismo y respondo a cada una de ellas. En particular, muestro que no afectan la posición de Beall y Restall.; In this paper, I defend one version of logical pluralism. In the first part, I consider different formulations of pluralism, I analyze their shortcomings, and finally I introduce the version I will defend, which is Beall and Restall’s pluralism (1999, 2000, 2006). In the second part, I present the main objections of four monists (Quine, Read, Priest, and Field) and then I answer to each one of them. In particular, I show that these objections do not affect Beall and Restall’s position.

Arquitectura moderna: Autores y producción en Mendoza Argentina (1930-1970); Modernist architecture: Architects and works in Mendoza - Argentina (1930-1970) Raffa, Cecilia Beatriz; Cirvini, Silvia Augusta Este trabajo propone trazar un panorama general del desarrollo de la Arquitectura Moderna en Mendoza entre 1930 y 1970, a través de los autores y obras más significativos. La producción arquitectónica lograda en el período, en el presente de valor patrimonial, no cuenta con acciones gubernamentales ni legislación de protección. Esto se debe a dos razones concurrentes: La primera, desde el imaginario social el recorte temporal de lo patrimonial finaliza con la arquitectura de los años ’20 del siglo pasado. La segunda razón, la estética y la vigencia funcional de estas obras impiden poner la distancia crítica que requiere toda mirada histórica, aún más desde lo cultural. Vamos a revisar algunos autores a partir de sus trayectorias y su producción arquitectónica, con el objetivo de descubrir las singularidades de la producción local, haciendo aportes para la valoración de estos bienes y por ende para su patrimonialización.; This paper proposes to trace an overview of the development of modern architecture in Mendoza between 1930 and 1970, following the most relevant architects and their works. No government measures or legislation have ever been implemented to protect the architectural heritage of this period. There are two parallel causes for this inaction: firstly in the collective imagination, heritage as a concept pertains to any historical period up to the 1920s. Secondly, the possibility of achieving the objectivity necessary to achieve a historical perspective of modern architecture is hampered by the works’ ongoing aesthetic and functional relevance. A cultural perspective is still more difficult to achieve. We review the trajectories and buildings of a number of architects in order to discover their local singularities, thus contributing to an appreciation of these works of architecture and their subsequent protection as part of our heritage.

Formalizing dialectical explanation support for argument-based reasoning in knowledge-based systems García, Alejandro Javier; Chesñevar, Carlos Iván; Rotstein, Nicolas Daniel; Simari, Guillermo Ricardo The concept of explanation has received attention from different areas in Computer Science, particularly in the knowledge-based systems and expert systems communities. At the same time, argumentation has evolved as a new paradigm for conceptualizing commonsense reasoning, resulting in the formalization of different argumentation frameworks and the development of several real-world argument-based applications. Although the notions of explanation and argument for a claim share many common elements in knowledge-based systems their interrelationships have not yet been formally studied in the context of the current argumentation research in Artificial Intelligence. This article explores these ideas by providing a new perspective on how to formalize dialectical explanation support for argument-based reasoning. To do this, we propose a formalization of explanations for abstract argumentation frameworks with dialectical constraints where different emerging properties are studied and analyzed. As a concrete example of the formalism introduced we show how it can be fleshed out in an implemented rule-based argumentation system.

Acciones y estrategias en lo público: algunas reflexiones sobre (y en) la catástrofe López, Matías David En este trabajo se parte de analizar ciertas políticas -y omisiones- que se pueden entender como detonantes y causantes de las inundaciones que se produjeron el 2 de abril en la ciudad de La Plata. Para luego abordar ciertas estrategias construidas desde la sociedad civil que buscaron hacer frente a una situación de catástrofe como los hechos ocurridos y ensanchar el campo de lo público. Se construyen para esto tres categorías analíticas: estrategias de sobrevivencia, de acción política colectiva y de (re)presentación. La intención es generar un artículo de registro abierto entre el ensayo y la investigación de análisis de material empírico (material y construcción viva, sentida y afectada), buscando de conjunto una reflexión crítica y argumentativa, que tiene como punto de partida y se inserta una situación dramática vivenciada en la ciudad. En este sentido, es un trabajo de comprensión que necesariamente precisa conectarse con otras reflexiones para completarse, intervenir y aportar desde el campo de la comunicación social y las ciencias sociales.

Effect of gamma irradiation and storage time on microbial growth and physicochemical characteristics of pumpkin (Cucurbita Moschata Duchesne ex Poiret) puree Gliemmo, María Fernanda; Latorre, Maria Emilia; Narvaiz, Patricia; Campos, Carmen Adriana; Gerschenson, Lia Noemi The effect of gamma irradiation (0–2 kGy) and storage time (0–28 days) on microbial growth and physicochemical characteristics of a packed pumpkin puree was studied. For that purpose, a factorial design was applied. The puree contained potassium sorbate, glucose and vanillin was stored at 25 ℃. Gamma irradiation diminished and storage time increased microbial growth. A synergistic effect between both variables on microbial growth was observed. Storage time decreased pH and color of purees. Sorbate content decreased with storage time and gamma irradiation. Mathematical models of microbial growth generated by the factorial design allowed estimating that a puree absorbing 1.63 kGy would have a shelf-life of 4 days. In order to improve this time, some changes in the applied hurdles were assayed. These included a thermal treatment before irradiation, a reduction of irradiation dose to 0.75 kGy and a decrease in storage temperature at 20 ℃. As a result, the shelf-life of purees increased to 28 days.

Mesoporous Thin Films of TiO2 on Attenuated Total Reflection Crystals. An In Situ Fourier-Transform Infrared Study of the Kinetics and Equilibrium of Adsorption and Photocatalysis of Carboxylic Acids Roncaroli, Federico; Martínez, Eduardo David; Soler Illia, Galo Juan de Avila Arturo; Blesa, Miguel Angel Highly organized titanium dioxide (TiO2) mesoporous thin films were deposited directly on silicon attenuated total reflection (ATR) crystals by dip-coating, submitted to two different thermal treatments, and characterized by ellipsometric porosimetry analysis (EPA), X-ray diffraction, and electron microscopy. The kinetics and equilibrium of the adsorption of oxalic acid as well as their photocatalytic efficiency were studied in situ by Fourier transformed infrared spectroscopy (FTIR-ATR). The spectral properties and the Langmuir constants of the detected surface complexes resemble those previously found in TiO2 Degussa P25 and anatase particulate films. The photocatalytic activity for the oxidation of oxalic acid was found to be similar to the corresponding one for Degussa P25. The kinetics of adsorption of oxalic acid follows a pseudo-first-order behavior. The pseudo-first-order rate constants show a linear relationship with the oxalic acid concentration. Adsorption (ka) and desorption rate constants (kd) were obtained. The ka values were analyzed in relation to the pore and neck sizes, accessible volume, thickness, and film area. The film area affects strongly the kinetic parameters, while no clear dependence on the thickness value was observed. When the film area is taken into account, adsorption rates on mesoporous films are appreciably larger than on particulate films. Thus, enhanced adsorption rates make mesoporous films better candidates as photocatalysts. The difference is interpreted in terms of a reduced tortousity in the ordered mesoporous films, probably due to their regular spatial order. It is also concluded that sensors and catalysts based on mesoporous films should respond faster than those based on conventional films.

Acerca de los argumentos del cambio educativo: La crisis de la racionalidad pedagógica; On the arguments of education change: The Crisis of Pedagogic Rationality Skliar, Carlos Bernardo La educación puede ser entendida como la perdurabilidad en el tiempo, y el sostén en su estructura e instituciones, de una serie de argumentos entendidos como habituales y naturales. Entre ellos: la lógica de la explicación, el llenado del otro, la puesta en el futuro de los ideales educativos y la comprensión asimilatoria de las diferencias. Su carácter de racionalidad pasada y presente no hace más que prometer un único argumento definitivo que vuelve a instalar con más fuerza su propia razón de ser: el cambio educativo.; Education can be understood as the durability over time, and support in its structure and institutions, of a series of arguments understood as natural and normal. Among them: the logic of the explanation, the filling of the other, to put in the future educational ideals and assimilatory understanding of differences. His character of past and present rationality, merely promise a definitive argument that only becomes harder to install his own rationale: educational change.; L’éducation peut être comprise comme la durabilité dans le temps, et le soutien dans sa structure et les institutions, d’une série d’arguments entendus comme habituels et normaux. Parmi eux: la logique de l’explication, le remplissage de l’autre, l’avenir des idéaux éducatifs et la compréhension assimilative des différences. Son caractère de rationalité passé et le présente, seulement promets un argument définitif qu’installe une et autre fois sa propre raison d’être: le changement en éducation.